Device fob steadying logs in sawmills



UNITED STATES PATENT OFFICE.

RILEY DOTY, OF CARDINGTON, OHIO.

DEVICE FOR STEADYING LOGS IN SAWMILLS.

Specification of Letters Patent No. 25,492, dated September 20, 1859.

To all whom 'it may concern.'

Be it known that I, RILEY DoTY, of Cardington, in the county of Morrowand State of Ohio, have invented certain new and useful Improvements inSawmills; and I do hereby declare that the following is a full, clear,and exact description of the same, reference being had to theaccompanying drawings, and to the letters of reference marked thereon. l

My invention relates to a mode of sustaining` the log in a steadyposition upon the carriage, during the process of'sawing.

In the annexed drawings Figure l represents a side elevation. Fig. 2 isa plan view. Fig. 3 is a perspective view of a portion ot one of theframes for sustaining the log.

In the figures A, represents the frame of the mill, upon which the logcarriage B, is placed and operated. The carriage B, moves backward andforward upon the said frame A, in the usual manner, and is provided witha head block C, and a tail block D.

F, F, are two small frames which are secured upon frame A, under thecarriage. These small frames consist of two uprights, (d), both of whichare provided with journals n, n, which rest and work in suitable journalbearings. These two supports are connected together by means ofcrosspieces (I), and above these crosspieces, by means of rollers, a, a.

'11, c', represent cords which are secured to the frames F, F, by meansof links m, m, said cords pass over pulleys, c, c, and have attached totheir lower ends weights J, J.

H, is a spring which has a shoulder on it at c, and which is providedwith a block ai which is triangular, forming an inclined plane on thespring as seen. When a log is placed upon the carriage with its endsresting upon the head and tail blocks it is supported at twointermediate points by the rollers, a, a, the tops of the rollers beingin line with the tops of said blocks. Wrhile the carriage stands in theposition in whichl it was when the log was placed upon it, the trame F,is borne down by the head block C, and remains in an inclined positionunder said block until the carriage commences to move. As the carriagemoves the head block leaves the frame F, which is immediately raised toa perpendicular position by means ot' the cord c and weight J, and actsas a support for the log. As the log progresses, both rollers standunder and support it until the tail block strikes the inclined plane 0c,on spring H. As said block passes over the inclined plane the spring H,is borne down and the frame F is free to be acted upon and pressed downout of the way of the saw by the said tail block. The frame F, fallstoward the saw but is placed at such a distance from it that it will notstrike or come in contact with it.

Vhen the frame F', stands in an erect position the shoulder c stands onone side of the cross bar I, while the inclined plane a?, stands on theother side, presenting a shoulder to the said cross bar, so that theframe is kept rmly in a standing position until it is borne down by thetail block. The advantages of this arrangement are very greatin sawinglong logs, or small logs, as without the supports between the blocks, ateach end of the log, it is apt to sway up and down with the motion ofthe saw, and sometimes great damage ensues. By means of these supportingrollers the log is kept securely in its place, and is always properlysupported.

Having thus fully described my invention what I claim as new and desireto secure by Letters Patent is- The employment of the adjustable framesF, F', provided with journal bearings a, a, and with rollers a, cz, thesame being operated in one direction by means of the head and tailblocks and in the opposite direction by means of a cord and weight, oneof said frames being stationed as described by a spring H, provided witha shoulder c and an inclined plane -the whole being arrangedsubstantially as and for the purpose specied.

RILEY DOTY.

Witnesses HENRY STINER, E. HEALEA.

